Introduction to systems of systems engineering DahmannJudith HenshawMichael 2016 This article provides an introduction and overview of basic concepts of ‘systems of systems’ (SoS). Beginning with the definition of SoS and SoS engineering, the paper describes the characteristics of SoS. It compares systems with SoS and discusses the implications for systems engineering. Finally, the paper concludes with a discussion of the challenges SoS pose for systems engineering with a description of recognized SoS ‘pain points.